[PATCH 2/3] linux: Use pthread_sigmask on sigprocmask

[Adhemerval Zanella]

With pthread_sigmask on libc.so, it allows consolidate both
implementations.

Checked on x86_64-linux-gnu.
---
 nptl/pthreadP.h                       |  3 +++
 nptl/pthread_sigmask.c                |  4 +++-
 sysdeps/unix/sysv/linux/sigprocmask.c | 20 +++++---------------
 3 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 06fb0d74c5..c6d8fc69be 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -482,6 +482,9 @@ extern void __pthread_testcancel (void);
 extern int __pthread_clockjoin_ex (pthread_t, void **, clockid_t,
 				   const struct timespec *, bool)
   attribute_hidden;
+extern int __pthread_sigmask (int how, const sigset_t *newmask,
+			      sigset_t *oldmask);
+libc_hidden_proto (__pthread_sigmask)
 
 
 #if IS_IN (libpthread)
diff --git a/nptl/pthread_sigmask.c b/nptl/pthread_sigmask.c
index c7860e02a5..9c7e9e270a 100644
--- a/nptl/pthread_sigmask.c
+++ b/nptl/pthread_sigmask.c
@@ -23,7 +23,7 @@
 
 
 int
-pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
+__pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
 {
   sigset_t local_newmask;
 
@@ -47,3 +47,5 @@ pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
 	  ? INTERNAL_SYSCALL_ERRNO (result)
 	  : 0);
 }
+libc_hidden_def (__pthread_sigmask)
+weak_alias (__pthread_sigmask, pthread_sigmask)
diff --git a/sysdeps/unix/sysv/linux/sigprocmask.c b/sysdeps/unix/sysv/linux/sigprocmask.c
index eb9e4d5e83..6ed0ab1e6a 100644
--- a/sysdeps/unix/sysv/linux/sigprocmask.c
+++ b/sysdeps/unix/sysv/linux/sigprocmask.c
@@ -22,21 +22,11 @@
 int
 __sigprocmask (int how, const sigset_t *set, sigset_t *oset)
 {
-  sigset_t local_newmask;
-
-  /* The only thing we have to make sure here is that SIGCANCEL and
-     SIGSETXID are not blocked.  */
-  if (set != NULL
-      && __glibc_unlikely (__sigismember (set, SIGCANCEL)
-	|| __glibc_unlikely (__sigismember (set, SIGSETXID))))
-    {
-      local_newmask = *set;
-      __sigdelset (&local_newmask, SIGCANCEL);
-      __sigdelset (&local_newmask, SIGSETXID);
-      set = &local_newmask;
-    }
-
-  return INLINE_SYSCALL_CALL (rt_sigprocmask, how, set, oset, _NSIG / 8);
+  int result = __pthread_sigmask (how, set, oset);
+  if (result == 0)
+    return 0;
+  __set_errno (result);
+  return result;
 }
 libc_hidden_def (__sigprocmask)
 weak_alias (__sigprocmask, sigprocmask)
-- 
2.17.1